In the weak field scheme,the full energy matrices are derived for d4,bions configuration in the trigonal symmetry in terms of Racah s irreducible tensor operator method, with the help of VAX-Ⅱ computer and based on the method of full diagonalizing, the D groundstate final splitting of antiferromagnetic FeCO3 is successfully explained.
在弱场图象下,利用Racah不可约张量算符法得到了三角对称d4,5电子组态的完全能量矩阵。